Headset



FIG. 1 is a top plan view of a headset showing our new design;

FIG. 2 is a left side elevational view thereof; the right side elevational view being a mirror image thereof;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a rear elevational view thereof.

The bottom surface of the claimed design is plain and unornamented. 

The ornamental design for a headset, as shown and described. 